Bed-spring.



EDWARD A. LAMM, 0F GOLDEN, NEW YORK.

BED-SPRING.

Application filed May 20, 1918.

To all 107mm t may concern:

Be it known that I, EDWARD A. LMM, a citizen of the United States, residing at Colden, in the county of Erie and State of New York, have invented new and useful Improvements in Bed-Springs, of which the following is a specification.

rlhis invention relates to beds particularly to bed springs and has for its object the provision of a bed spring provided transversely of its central portion with an auX iliary spring truss device whereby sagging of the spring will be prevented.

An important object is the provision of a bed spring having spring trussing means of this character which is unsecured to the spring portion proper except at the sides of the spring but which is connected to the frame supporting the spring.

A further bbject is the provision of a spring pressed structure of this character which is provided with adjusting means whereby the tension of the springs in the truss structure may be varied.

A further object is the provision of a device of this character which will be eX- tremely simple and inexpensive in manufacture, highly eiiicient and durable in use, and a general improvement of the art.

Vith the above objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawing in which:

Figure 1 is a bottom plan view of a bed spring showing my device applied thereto,

Fig. 2 is a longitudinal sectional view and Fig. 3 is a cross sectional view.

Referring more particularly to the drawing the, numeral 5 designates the frame of a bed spring constructed in the usual manner of the longitudinal bars 6 and the transverse bars 7 to which are secured the clamping strips 8 position. No claim is made for the construction of the device up to this point.

In carrying out my invention I provide a spring truss structure disposed transversely of the central portion'of the spring and comprising a pair of transversely eX- tending strips 11 which have their extremities secured to the side edges of the spring fabric 9 as shown at 12. These strips 11 are Specification of Letters Patent.

which hold the spring fabric 9 in' Patented Oct. 1, 1918.

Serial No. 235,658. i

thereto at intervals by riveting or any other suitable means, channel bars 13 which extend longitudinally of the spring proper. Adjacent the sides of the spring fabric 9, the channel bars 13 are disposed close together while at the intermediate portion of the spring they are disposed farther apart as shown.

Associated with each channel bar 13 is a. pair of link members 14:, each of which is formed substantially l V-shaped with the divergent ends of its arms disposed against the inner side of the end of the channel bars 18 and pivotally secured thereto as shown at 15. The convergent ends of the arms of each link 14k are provided with holes 16 in which are engaged the ends of a coil spring 17 whereby the links 14 are normally urged together. Rods 18 are also looped within the holes 16 in the ends of the links 14 and are looped within holes 19 in the transverse frame bars 7.

From the foregoing construction it will be seen that when weight is disposed upon the central portion of the spring fabric 9, downward movement of the strips 11 will result in a tendency to move the links 14 outwardly away from each other this movement being opposed by the resilience of the springs 17. Regardless of the weight placed upon the central portion of the spring, downward movement of the truss structure will be opposed by the resilience of the springs 17 and sagging of the spring fabric 9 will thus be prevented.

In order that the device may be adjusted tb take up any looseness caused by continuous wear or to render the spring structure more or less susceptible to certain weights I may find it advisable to provide the rods 18 with turnbuckles 20 whereby the rods may be lengthened or shortened for varying the tension on the springs 17.

From the foregoing description and a study of the drawing it will be apparent that I have thus provided an auxiliary spring truss structure associated with a bed spring whereby sagging of the bed spring from continuous use will be positively prevented.

It will of course be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not depart from the spirit oi the invention nor the scope of the subjoined claim.

Having thus described my invention What I claim is In combination With a bed spring, a truss structure comprising a pair of strips disposed transversely o and against the underside of the spring, spaced channel bars se- 10 cured tp said strips transversely thereof, a

pair of V-shaped arms having their extremities disposed against the inner sides oi.l the flanges of each channel bar and pivotally connected therewith, a rod connected With each arm and with the adjacent end of the spring frame, and a coil spring connected With each pair of arms.

In testimony whereof I affix my signature.

EDWARD A. LAMM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, ID. C. 

